Water Wars
Contrary to what you may believe, the Earth doesn't actually have an infinite amount of water — and no water means no food. Do we have your attention now? Like all of our planet's other problems, humans aren't doing a very good job of conserving what we have, sparking conflict all over the world and causing actually water wars. With seed banks, science is giving us a little reassurance about our future food sources but ultimately the biggest factor in conserving our water supply is us.